Method and means for producing pipes of cementitious material



J. FERLA May 14, 1940.

us'rnon AND nuns FOR PRODUCING Plans 0F unanimous MATERIAL Filed Juno 6, 1938 2 She ota-Shpot 1 way May 14, 1940. J. FERLA .200.267 unzrnonmn anus ronrnonucme urns 0F cmwmrrxous MATERIAL Filed June s, 1938 2 Sheets-Sheet 2 Patented M 14,, 1940 r 2,200,267-

UNITED I STATES PATENT OFFICE METHOD AND MEANS FOR PRODUCING PIPES OF CEMENTITIOUS MATERIAL John Fel'la, Chicago, 111., assignor to Levi H. Blouch, Merchantville, N. J.

Application June 6, 1938, Serial No. 212,071

7 Claims. ((31. 25-30) The invention relates to a method of and means carries a worm 28, mesh with a Wheel for producing tubes of cementitious composition mounted on the shaft l8a. of roller 18. material, with or without integral bell collars. Rollers l8 and 2| are eng n e Surface It is an object of the invention to provide a by a blade 30 to prevent material from adhering novel method and means for producing pipes with to the rollers, after deposit on t mandrelor without bell collars from substantially dry ceppe 32 and are Supported above the mentitious composition material, so as to produce f a e St uctur e having a discharge Chute non-porous and highly resistant pipes in an eco- 34, capable of discharging dry material onto the nomical and efficient manner. mandrel and the calender rollers, respectively.

It is a further object to superpose, under pres- An a tat r 35 n each pp mixes the matesure, semi-dry layers of composition material and r a a a feeding r near the lower end of to entirely dispense with a liquid mixture in the t hopp r, r ulat s th rat f s a The production of tubes of composition material. a itators ndfeeding r0118 m y e r ve f m Other equallyimportantobjects will becomeapany c nve ient ur f p w parent from a perusal of the invention, which p y p s 31 discharge an atomized liquid comprises the steps of anovel method carried out nt ea h of th Calender o s, S a to by means described in the following specificapart a pasty t cy t t a e tion,- particularly pointed out in the claims form- The mandrel l9, as shown in Fig. 3, is shaped ing a part thereof, and illustrated in the more or to form tubes with a bell collar. Of course, an less diagrammatic views in r the drawings, in ordinary St t may be Produced, Sheet- 0 which: ing may be molded.

Fig. 1 is an elevational view of an apparatus The roller I8 is formed near the left end, as constructed in accordance with my invention. viewed in Fig. 3, with an external circumferen- Fig. 2 is a detail view of a drive mechanism, tial bead 38 and, at the right end, the mandrel Fig. 3 is a section through the apparatus, and is provided with a circumferential groove 39, so

Fig. 4 is a section through a tube made in acthat the tube 40, when molded, has an external cordance with my invention. circumferential groove 4| at the left end, and an The apparatus includesaframe structuregener internal circumferential groove 42, at'the right ally indicated by It, and composed of upright e clmembers II, which are connected by longitudi- In assembling the pipes, the smaller end of one nal members l2 and cross members l3 and I4. pipe enters the bell collar end of the adjacent I A semi-circular apron I5 is secured to the one, so that the grooves 4| and 42 align and a frame structure to form a trough into which masuitable packing for sealing the joint may be interial, during the molding process of the tubes, troduced. may fall and be re-used. If desired, one or two of the hoppers may be In bearings l6 and I! (Fig. 3), secured to the dispensed with, and only one or two hoppers utiframe, the shaft l8a of acarrying and drive roller lized, in which event the hopper may be ar-v IB is 'ournaled, on which rest an accumulating ranged for horizontal adjustment to selectively roller or mandrel l9, whose shaft 20 is also jourdischarge unto either of the calender rollers or naled in said bearings, which are open at the top the mandrel. 40 so as to afford a floating support for said man- While the drawings show a preferred embodidrel. ment of. the apparatus for carrying out my novel The mandrel It is engaged by two calender method, numerous changes may be made, both as rollers 2|, which are driven from roller l8, by to the apparatus and the sequence of steps of the chains or belts 22 and 23, there being a take up method. device 24 provided for each belt, whereby the I, therefore, do not limit myself to details of horizontal position of the calender rollers 2| may construction, nor the particular sequence of be varied. Set screws I'm, in bearings l6 and I1, steps, but claim my invention as broadly as the maintain proper contact between rollers l8, l9 state of the art permits.

and 2|. I claim:

The drive for the apparatus includes a motor 1. The method of forming cementitious tubes 25 mounted on a base plate 26 adjacent the frame on a mandrel having a bell end, including the structure, pivotally mounted on a suport 26a and steps of feeding dry cementitious material to said held in position by a set screw 26b. The elonmandrel, and superposing on the dry material a gated motor shaft is Journaled in bearings 21 and layer of moist material to build up a tube com- 55 prised of alternate dry and moistened materials.

2. The method of forming cementitious tubes on a mandrel having a bell end, including the steps of feeding dry cementitious material to said mandrel to form a coating thereon, and superposing on the dry coating another coating of moist material under pressure to build up a tube compacted of alternate dry and moistened materials.

3. The method of forming cementitious tubes 'having'a bell and on a mandrel, including the steps of rotating said mandrel, feeding dry cementitious material to said mandrel to form a coating thereon, and applying moist coatings on top of the dry coating, said coatings being compacted to form a tube.

4. The method of forming cementitious tubes on a mandrel under pressure from molding rollers, including the steps of rotating said mandrel and said rollers, feeding dry material to said mandrel to form a coating thereon, and simultaneously superposing by said rollers moist coatings' on the dry mandrel coating.

5. The method of forming cementitious tubes on a mandrel under pressure from molding rollers, including the steps of rotating said ndrei and said rollers, feeding dry material to said mandrel and said rollers, and simultaneously and said rollers, and means for simultaneously moistening the material on said rollers to super-= pose moist coatings on the dry coating of the mandrel.

'7. Apparatus for forming cementitious tubes,

including a mandrel, a plurality of calender rollers cooperating with said mandrel, means for uniformly rotating said mandrel and said rollers, means for feeding dry material to said mandrei and said rollers, means for simultaneously moistening the material on said rollers to superpose moist coatings on the dry coating of the mandrel, and means for automatically removing the material still adhering to said rollers after contact with said mandrel.

- JOHN FERLA. 

